PQ60120QTA12 Datasheet, PDF (7/13 Pages) SynQor Worldwide Headquarters – Quarter-brick DC/DC Converter

Technical Specification
Input: 35-75 V
Output: 12 V
Current: 12 A
Package: Quarter-brick
See Fig. 15
10 µH
source
impedance
See Fig. 14
See Fig. 16
i_S
V_SOURCE
i_C
47 µF,
≅1Ω ESR
electrolytic
capacitor
DC/DC
Converter
V_OUT
1 µF 10 µF,
ceramic
capacitor
100mΩ ESR
tantalum
capacitor
Figure 13: Test set-up diagram showing measurement points for Input
Terminal Ripple Current (Figure 14), Input Reflected Ripple Current
(Figure 15) and Output Voltage Ripple (Figure 16).
Figure 14: Input Terminal Ripple Current, ic, at full rated output cur-
rent and nominal input voltage with 10µH source impedance and 47µF
electrolytic capacitor (200 mA/div). See Figure 13.
Figure 15: Input reflected ripple current, is, through a 10 µH source
inductor at nominal input voltage and rated load current (5 mA/div).
See Figure 13.
Figure 16: Output voltage ripple at nominal input voltage and rated
load current (50 mV/div). Load capacitance: 1µF ceramic capacitor
and 10µF tantalum capacitor. Bandwidth: 500 MHz. See Figure 13.
14
12
10
8
6
4
2
0
0
35 V
48 V
75 V
2
4
6
8
10
12
14
16
Load Current (A)
Figure 17: Output voltage vs. load current showing typical current limit
curves and converter shutdown points.
Figure 18: Load current (5A/div) as a function of time when the con-
verter attempts to turn on into a 1 mΩ short circuit. Top trace
(2ms/div) is an expansion of the on-time portion of the bottom trace.
Product # PQ60120QTA12
Phone [phone]
www.synqor.com
Doc.# 005-2QT612C Rev. A 10/4/04
Page 7